Liquid side
Gas side
Interfacial
Both liquid and gas side
✅ The correct answer is option B.
Mass Transfer MCQs
Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as
K ∝ D
K ∝ √D
K ∝ D1.5
K ∝ D2
✅ The correct answer is option B.
In a moderately sized packed absorption tower, channeling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter
> 4 :1
< 8 : 1
> 8:1
< 6:1
✅ The correct answer is option C.
Agitator is provided in a crystalliser for
Avoiding deposition on cooler surfaces
Formation of nuclei
Crystal growth
All of the above
✅ The correct answer is option D.
As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages
Increase
Decrease
Remain unchanged
Can either increase or decrease, depends on the system
✅ The correct answer is option B.
Relative volatility does not change appreciably with the change in
Temperature
Vapour pressure of either component
Total pressure
None of these
✅ The correct answer is option A.
Critical humidity of a solid salt means the humidity
Above which it will always become damp
Below which it will always stay dry
Both A and B
Above Which it will always become dry and below which it will always stay damp
✅ The correct answer is option C.
Flooding in a column results due to
High pressure drop
Low pressure drop
Low velocity of the liquid
High temperature
✅ The correct answer is option A.
Molarity is defined as the number of gm moles of solute per __________ of solvent.
Litre
Kg
Gm
C.c
✅ The correct answer is option A.
Which of the following parameters remains constant during chemical dehumidifica-tion?
Dry bulb temperature
Partial pressure of vapour
Wet bulb temperature
None of these
✅ The correct answer is option A.